Swift程序：检查给定字符串是否为关键字

import Foundation
import Glibc

// Array containing all the keywords 
let myKeywords: [String] = ["associatedtype", "init", "protocol", "class", "inout", "public", "deinit", "internal", "rethrows", "enum", "let", "static", "extension", "open", "struct", "fileprivate", "operator", "subscript", "func", "private", "typealias", "var", "import", "precedencegroup", "if", "else", "for", "while", "do", "break", "continue", "return", "in", "case", "repeat", "catch", "fallthrough", "throw", "default", "guard", "switch", "defer", "where", "Any", "nil", "as", "throws", "self", "true", "false", "Self", "try", "is", "super", "associativity", "left", "Protocol", "convenience", "mutating", "required", "didSet", "none", "right", "dynamic", "nonmutating", "set", "final", "optional", "some", "get", "override", "Type", "indirect", "postfix", "unowned", "infix", "precedence", "weak", "lazy", "prefix", "willSet", "#available", "#error", "#imageLiteral", "#colorLiteral", "#fileID", "#keyPath", "#column", "#fileLiteral", "#line", "#dsohandle", "#filePath", "#selector", "#elseif", "#file", "#sourceLocation", "#else", "#function", "#warning", "#endif", "#if"]

// Function to check if the given string is a keyword or not
func checkKeyword(str: String) -> Bool {
   return myKeywords.contains(str)
}

// test case 1
let myString1 = "var"
if (checkKeyword(str: myString1) == true) {
   print("YES! \(myString1) is a keyword")
}
else {
   print("NO! \(myString1) is not a keyword")
}

// test case 2
let myString2 = "Sky"
if (checkKeyword(str: myString2) == true) {
   print("YES! \(myString2) is a keyword")
}
else {
   print("NO! \(myString2) is not a keyword")
}